Generally, criticism on economics can be summed up largely in two ways. One is the uncertainty of prediction. Uncertainty increases in economy on account of many related variables. The other is doubts about economic activities and economics. Classical economics assumes that every human being thinks reasonably. But reasonability presupposed in classical economics involves a gap between the unrealistic premise and economic activity resulted from that. In other words, economics is based on the notion of the best and the second best. The best is the area where perfect competition comes into existence. In perfect competition, it is presupposed that all humans are reasonable economists and are equipped with information (the completeness of information).